ISTANBUL - Turkish Prime Minister Tayyip Erdogan rebuked the UN Security Council for inaction over Syria on Saturday as war intensified across the country, saying the world body of superpowers was repeating mistakes that led to massacres in Bosnia in the 1990s.
Syrian President Bashar Assad's forces used air strikes and artillery to bombard insurgents on several fronts in the 19-month-old conflict, which risks dragging in regional powers with no sign of a diplomatic breakthrough.
Turkey - increasingly entangled after having intercepted a Syrian airliner carrying what it said were Russian-made munitions for the Syrian army, infuriating Moscow and Damascus - has led calls for intervention, including no-fly zones enforced by foreign aircraft to stop deadly air raids by Assad's forces.
But there is little chance of United Nations support for robust action given the opposition of veto-wielding Security Council members Russia and China.
"The UN Security Council has not intervened in the human tragedy that has been going on in Syria for 20 months, despite all our efforts," Erdogan told a conference in Istanbul attended by dignitaries including Arab League Secretary General Nabil Elaraby. "There's an attitude that encourages, gives the green light to Assad to kill tens or hundreds of people every day."
The bloodshed has worsened markedly in the past two months although neither side has been able to gain a distinct advantage, with government force relying heavily on air power and artillery to batter the rebels.
Combat has been reported nationwide but the crucial strategic battles are being fought in an arc through western Syria, where most of the population lives.
Turkish Foreign Minister Ahmet Davutoglu was expected to meet UN special envoy Lakhdar Brahimi on the sidelines of the Istanbul conference later. UN Secretary-General Ban Ki-moon said this week Brahimi would visit Syria soon to try to persuade Assad to call an immediate ceasefire.
The government dispatched warplanes to attack insurgent forces surrounding the Wadi-al-Dayf military barracks near Maarat al-Numan in Idlib province, wounding 22 rebels, the Syrian Observatory for Human Rights said.
The rebels captured Maarat al-Numan this week, cutting the main north-south highway linking Damascus, Homs and Aleppo, and government forces will need to retake it in order to reinforce and resupply Aleppo - Syria's largest city and commercial hub.
Memories of Srebrnica
The UN Security Council, divided between Western powers on one side and Russia and China on the other, has proved helpless in halting a conflict which has spiralled into civil war and killed more than 30,000 people.
Erdogan said a system which allowed one or two nations to block intervention in such a massive humanitarian crisis was inherently unjust, and that Syria would go down in history as a UN failure much like Bosnia in the 1990s.
"How sad is that the United Nations is as helpless today as it was 20 years go when it watched the massacre of hundreds of thousands of people in the Balkans, Bosnia and Srebrenica," Erdogan told the Istanbul conference.
The July 1995 massacre in Srebrenica was the worst on European soil since World War Two, in which Dutch UN peacekeepers abandoned what had been designated a UN safe haven to advancing Bosnian Serb forces, who then killed 8,000 Muslim men and boys and bulldozed their corpses into pits.
Turkish officials had expressed hope they might be able to persuade Moscow, which sold Syria $1 billion of arms last year, to soften its strident opposition at the Security Council and that if it succeeded, China would follow suit.
But relations between Ankara and Moscow sank to a new low this week after Turkey forced down a passenger jet flying from Moscow and publicly accused Russia of ferrying military equipment to Assad's forces.
Russia has said there were no weapons on the plane and that it was carrying a legal shipment of radar equipment.
Rebels control border town, for now
Elsewhere on Syria's battlefronts on Saturday, government forces rained mortar fire down on the opposition-held Khalidiya neighborhood of the city of Homs, the Observatory said. Explosions were felt throughout the besieged district.
To the south of Damascus near Deraa - cradle of the uprising whicb began with peaceful street rallies - Assad's troops and rebels were fighting on the edge of the town of Maarba.
After four days of heavy fighting in and around the town of Azmarin on the Turkish border, the rebels appeared to have a fragile hold.
Syrian government forces have been shelling the town from the hills and troops have been engaged in street battles with the insurgents over the past week. Shelling continued into Friday evening but only the sound of distant mortar fire could be heard on Saturday as battles for other border areas flared.
"Praise be the town is now in our hands ... We have raised two flags inside the town and the battles are over. Azmarin is completely under our control," one resident, who did not want to be named, told Reuters by telephone from inside the town.
In a preliminary death toll across the country for Friday alone, the Observatory listed about 160 dead. That included 67 civilians, 36 rebels fighters, and 54 government soldiers.
Among the dead were two civilians, including a 3-year-old child, in a bombardment of old Aleppo, a district whose ancient buildings have been severely damaged by the conflict.
Turkish-Syrian tensions rise
Tensions between Ankara and Damascus have also worsened. Turkey scrambled two fighter jets on Friday after a Syrian helicopter bombed Azmarin and has warned of a more forceful response if Syrian shells continue to fly over the border.
Syria's state news agency SANA said Damascus was ready to accept a Russian proposal for a Syrian-Turkish joint security committee to try to contain the border violence, but there was no confirmation of this on the Turkish side.
The Beirut Star newspaper said in an editorial that the incidents on the Turkish-Syrian border represented a "potentially catastrophic turning point" which could turn the civil war into a regional one.
"With the border increasingly fortified, littered with Turkish and Syrian army tanks, it is beginning to more closely resemble a war zone than a demarcation line between two sovereign territories," it said.
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